Improvement of phosphorus availability by microbial phytase in broilers and pigs.

نویسندگان

  • P C Simons
  • H A Versteegh
  • A W Jongbloed
  • P A Kemme
  • P Slump
  • K D Bos
  • M G Wolters
  • R F Beudeker
  • G J Verschoor
چکیده

Techniques have been developed to produce microbial phytase for addition to diets for simple-stomached animals, with the aim to improve phosphorus availability from phytate-P in plant sources. The activity of the crude microbial phytase showed pH optima at pH 5.5 and 2.5. The enzyme was able to degrade phytate in vitro in soya-bean meal, maize and a liquid compound feed for pigs. When microbial phytase was added to low-P diets for broilers the availability of P increased to over 60% and the amount of P in the droppings decreased by 50%. The growth rate and feed conversion ratio on the low-P diets containing microbial phytase were comparable to or even better than those obtained on control diets. Addition of microbial phytase to diets for growing pigs increased the apparent absorbability of P by 24%. The amount of P in the faeces was 35% lower.

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عنوان ژورنال:
  • The British journal of nutrition

دوره 64 2  شماره 

صفحات  -

تاریخ انتشار 1990